我现在已经对这个问题进行了一段时间的研究,但一直无法解决。在这个memorygame
中,每次选择一个按钮,然后是左上角的按钮(第一次选择该按钮),左上角的按钮变为绿色。这是因为只要您第一次选择左上角按钮并作为第二选择,public void actionPerformed(ActionEvent e)
中的代码就会执行两次。任何可能导致这种情况的想法以及如何阻止它发生?
我确信有很多方法可以更好地创建memorygame
,但我讨厌继续前进而不知道出了什么问题。
感谢您的帮助。
所有代码:
public class Alt3_3 extends JFrame implements ActionListener {
JButton button[] = new JButton[52];
String[] kort = {"POTATIS", "GLASS", "UNIX", "GLAS", "FOSTERS", "AIGH",
"VAT 69", "SPIK", "FREDAG", "SITS", "FEST", "DaTe", "ALBIN",
"42", "BOTTLE", "SANDELS", "DEW", "STOL", "PETSKI", "LAGER", "STOUT",
"MALT", "EN RUTA", "BASS", "PrtScr", "DEL"};
String[] svar1;
String[] svar2;
boolean firstVald;
boolean green;
int score = 0;
int progress = 0;
int index1;
int index2;
String svark1;
String svark2;
Alt3_3() {
List<String> list1 = Arrays.asList(kort);
Collections.shuffle(list1);
svar1 = list1.toArray(new String[0]);
List<String> list2 = Arrays.asList(kort);
Collections.shuffle(list2);
svar2 = list2.toArray(new String[0]);
setLayout(new FlowLayout());
setPreferredSize(new Dimension(650, 700));
setTitle("Memorygame");
for (int i = 0; i < button.length; i++) {
button[i] = new JButton("");
button[i].setPreferredSize(new Dimension(100, 50));
add(button[i]);
button[i].addActionListener(this);
}
pack();
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e) {
if (firstVald == false) {
resetRed();
firstVald = true;
int index = -1;
for (int i = 0; i < button.length; i++) {
if (e.getSource() == button[i]) {
index = i;
break;
}
}
index1 = index;
if (index % 2 == 1) {
button[index].setText(svar1[(index - 1) / 2]);
svark1 = svar1[(index - 1) / 2];
} else {
button[index].setText(svar2[index / 2]);
svark1 = svar2[index / 2];
}
button[index1].removeActionListener(this);
} else {
int index = -1;
for (int i = 0; i < button.length; i++) {
if (e.getSource() == button[i]) {
index = i;
break;
}
}
index2 = index;
if (index % 2 == 1) {
button[index].setText(svar1[(index - 1) / 2]);
svark2 = svar1[(index - 1) / 2];
} else {
button[index].setText(svar2[index / 2]);
svark2 = svar2[index / 2];
}
if (svark1 == svark2) {
progress++;
green = true;
button[index1].setBackground(Color.green);
button[index2].removeActionListener(this);
button[index2].setBackground(Color.green);
} else {
green = false;
score++;
button[index2].removeActionListener(this);
button[index1].setBackground(Color.red);
button[index2].setBackground(Color.red);
}
firstVald = false;
}
if (progress > 26) {
showMessageDialog(null, "grattis" + Integer.toString(score));
filhant.highScore(score);
System.exit(0);
}
}
public void resetRed() {
if (green == false) {
button[index1].setBackground(null);
button[index2].setBackground(null);
button[index1].setText("");
button[index1].addActionListener(this);
button[index2].setText("");
button[index2].addActionListener(this);
}
}
public static void main(String[] args) {
new Alt3_3();
}
}
答案 0 :(得分:1)
对于两个按钮中的第一个,您始终致电resetRed
。 resetRed
将addActionListener
index1
指向index2
和resetRed
指示的按钮。由于这些被初始化为零,因此你安装了动作监听器的三个副本,并且代码不仅执行了两次而且执行了三次:第一个作为不匹配对的第二个元素,第二个和第三个作为a的两个元素执行配对。避免第一次调用{{1}}。